Thickening lentil dahl now it's cooked?

I've made the coconut dhal from the 5 o clock apron book for dinner. It's super wet and I'm not sure what to do - it has coconut milk so I can't just boil it furiously. And it's fully cooked so I can't now really add more lentils. Is there anything I can do to recover it?

Cook it gently til it reduces and thickens a bit? Or add a few small pieces of boiled potato, cook the dhal some more and then mash it roughly. You may need to adjust the seasoning. (But i like wet dhal!)